Understanding Radar and Laser
Your Detector
Nothing
Comes Close to a Cobra
®
29
Detection
Your Detector
28 English
Description
Interpretation
Recommended
Response
Tone repeats slowly at first, then
Probably police radar.
FULL ALERT
Tone sounds one
time only.
Probably a false alarm,
but possibly pulsed radar,
Exercise caution
Tone instantly begins
Radar, Spectre 1 or VG-2 nearby
FULL ALERT
Tone repeats slowly as you
approach a hill or bridge, then
speeds up sharply as you reach
Probably police
radar beyond the
hill or bridge.
FULL ALERT
Tone repeats slowly
Probably a false alarm.
Exercise caution
Any type of laser alert.
Laser alerts are
FULL ALERT
Any Safety Alert
or Strobe Alert.
You are nearing an emergency
vehicle, railroad crossing, or road
hazard (construction, accident,
Exercise caution
Responding to Alerts
•
Understanding Radar and Laser
•
Radar Speed Monitoring Systems
Three band frequencies have been approved by the Federal Communications
Commission (FCC) for use by speed monitoring radar equipment:
X band
10.525 GHz
K band
24.150 GHz
Ka band
33.400 – 36.00 GHz
Your detector detects signals in all three radar bands, plus Ku band (13.435 GHz),
which is an approved frequency used in parts of Europe and Asia.
VG-2 and Spectre 1
VG-2
and
Spectre 1
are “detector detectors” that work by detecting low-level
signals emitted by most radar detectors. Your detector does not emit signals that
can be detected by VG-2 or Spectre 1, but does detect VG-2 and Spectre 1 signals
and will alert you when a device is in use near your vehicle, if you
so choose.
Safety Alert Traffic Warning System
FCC-approved
Safety Alert
transmitters emit microwave radar signals that indicate
the presence of a safety-related concern. Depending on the frequency of the signal
emitted, it can indicate a speeding emergency vehicle or train,
or a stationary road hazard.
Because these microwave signals are within the K band frequency, most
conventional radar detectors will detect Safety Alert signals as standard
K band radar. Your detector, however, is designed to differentiate between standard
K band and Safety Alert signals, and give separate alerts for each.
Safety Alert technology is relatively new. Safety Alert transmitters can
be found in limited numbers in all 50 states, but the number is growing. Depending
on your location, you may not receive these alerts regularly
and may often encounter emergency vehicles, trains and road hazards
without being alerted. As the number of transmitters increases,
these alerts will become more common.
When you receive such an alert, please watch for emergency vehicles ahead
of you, on cross streets and behind you. If you see an emergency vehicle
approaching, please pull over to the right side of the road and allow it to pass.
